CN111573682A - High-purity quartz sand and production process thereof - Google Patents
High-purity quartz sand and production process thereof Download PDFInfo
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- CN111573682A CN111573682A CN202010360271.3A CN202010360271A CN111573682A CN 111573682 A CN111573682 A CN 111573682A CN 202010360271 A CN202010360271 A CN 202010360271A CN 111573682 A CN111573682 A CN 111573682A
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- quartz sand
- deionized water
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/18—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
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Abstract
The invention provides high-purity quartz sand and a production process thereof, belonging to the technical field of quartz sand production, wherein the content of silicon dioxide in the high-purity quartz sand is more than or equal to 99.98 percent, and the content of ferric oxide is less than or equal to 0.00098 percent. The high-purity quartz sand has high removal rate of impurities and iron through scrubbing, magnetic separation, flotation and microbial leaching, so that the product has high purity; the treatment temperature is not high in the impurity removal process, so that the product quality is not affected, and certain hardness can be kept. The preparation process of the high-purity quartz sand is simple, the cost is low, and the obtained product has high purity and good quality and is suitable for industrial large-scale production.
Description
Technical Field
The invention belongs to the technical field of quartz sand production, and particularly relates to high-purity quartz sand and a production process thereof.
Background
The quartz sand is a silicate mineral which is hard, wear-resistant and stable in chemical property, is an important industrial mineral raw material and is a non-chemical dangerous product, and is widely applied to industries such as glass, casting, ceramics and fireproof materials, ferrosilicon smelting, metallurgical flux, metallurgy, building, chemical industry, plastics, rubber, grinding materials, filter materials and the like. The industry often divides quartz sand into: common quartz sand, refined quartz sand, high-purity quartz sand, fused quartz sand, silicon micropowder and the like. Wherein the high-purity quartz sand is SiO2≥99.5—99.9％、Fe2O3Less than or equal to 0.001 percent of quartz sand, which is mainly used in high and new technology industries, such as aerospace, bioengineering, electronic technology, optical fiber, semiconductor and other fields. With the rapid development of science and technology, the demand of high-purity quartz sand is also remarkably increased, and the requirement on the purity of the quartz sand is higher and higher. ExistingThe technology has the defects of insufficient purity and poor quality of products obtained by purifying quartz sand.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the high-purity quartz sand and the production process thereof, and the high-purity quartz sand has higher purity and good quality; the high-purity quartz sand has simple production process and high product purity, and is suitable for industrial large-scale popularization.
In order to achieve the purpose, the invention is realized by the following technical scheme: the high-purity quartz sand contains silica not less than 99.98 wt% and ferric oxide not more than 0.00098 wt%.
The invention also provides a production process of the high-purity quartz sand, which comprises the following production processes:
(1) adding common quartz sand raw materials into a crusher for crushing, and screening out small-particle quartz sand from the crushed quartz sand by using a vibrating screen;
(2) mechanically scrubbing and desliming the small-particle quartz sand obtained in the step (1) in ultrasonic waves at the ultrasonic temperature of 45-65 ℃ for 2.5-4.5 hours, cleaning the small-particle quartz sand with deionized water after scrubbing, drying the small-particle quartz sand in an oven after cleaning for three times at the drying temperature of 65-75 ℃ for 24 hours;
(3) placing the dried quartz sand obtained in the step (2) in a magnetic machine for magnetic separation to remove magnetic substances in the quartz sand;
(4) adding deionized water into the quartz sand obtained in the step (3), uniformly mixing, adding a flotation agent, stirring for 2-3.5 hours, removing foams on the surface of the slurry, washing the residual liquid for three times by using the deionized water, filtering, and drying the filter cake in an oven at the drying temperature of 65-75 ℃ for 24 hours to obtain refined quartz sand;
(5) and (4) adding the microorganism leaching solution and deionized water into the refined quartz sand obtained in the step (4), reacting for 4-6 days, washing for three times by using the deionized water, and drying to obtain the high-purity quartz sand. Thin film iron and bonded impurities on the surface of the quartz sand can be removed by scrubbing; magnetic separation can be carried out to remove magnetic separation substances; the flotation can remove impurities which cannot be removed by magnetic separation, so that the purity of the product is further improved; the microorganism leaching can leach out the film iron and the dip-dyeing iron on the surface of the quartz sand, and the microorganism leaching does not discharge pollutants and pollute the environment.
Further, the particle size of the small-particle quartz sand in the step (1) is 0.03-0.08 mm.
Further, the flotation agent in the step (4) comprises the following components in proportion: 25-35 parts of ethyl dithio potassium carbonate, 20-30 parts of isomeric hexanol, 5-15 parts of sulfuric acid and 20-50 parts of deionized water.
Further, the mass concentration of the sulfuric acid is 10-15%.
Further, the microorganism leaching solution in the step (5) comprises thiobacillus ferrooxidans and thiobacillus thiooxidans.
Further, the number ratio of the thiobacillus ferrooxidans to the thiobacillus thiooxidans is 1-2: 1.5-2.5.
Further, the preparation steps of the microbial leaching solution are as follows: adding Thiobacillus ferrooxidans and Thiobacillus thiooxidans into a biological generator according to the ratio of the number of Thiobacillus ferrooxidans to the number of Thiobacillus thiooxidans to the number of the Thiobacillus thiooxidans, adding a certain amount of glucose solution and hydrochloric acid, keeping the pH at 2-2.5.
Further, the mass concentration of the hydrochloric acid is 5-10%.
Has the advantages that: compared with the prior art, the invention has the following advantages: according to the high-purity quartz sand and the production process thereof, the high-purity quartz sand has high removal rate of impurities and iron through scrubbing, magnetic separation, flotation and microbial leaching, so that the product has high purity; the treatment temperature is not high in the impurity removal process, so that the product quality is not affected, and certain hardness can be kept. The preparation process of the high-purity quartz sand is simple, the cost is low, and the obtained product has high purity and good quality and is suitable for industrial large-scale production.
Detailed Description
The invention will now be further illustrated by reference to the following specific examples.
Example 1
A production process of high-purity quartz sand comprises the following production processes:
(1) adding common quartz sand raw materials into a crusher for crushing, and screening small-particle quartz sand by using a vibrating screen, wherein the particle size of the small-particle quartz sand is 0.03-0.08 mm;
(2) mechanically scrubbing and desliming the small-particle quartz sand obtained in the step (1) in ultrasonic waves, wherein the ultrasonic temperature is 45 ℃, the ultrasonic time is 2.5 hours, cleaning is carried out by deionized water after scrubbing, drying is carried out in an oven after cleaning is carried out for three times, the drying temperature is 65 ℃, and the drying time is 24 hours;
(3) placing the dried quartz sand obtained in the step (2) in a magnetic machine for magnetic separation to remove magnetic substances in the quartz sand;
(4) adding deionized water into the quartz sand obtained in the step (3), uniformly mixing, and adding a flotation agent, wherein the flotation agent comprises the following components in parts by weight: 25 parts of ethyl dithio potassium carbonate, 20 parts of isomeric hexanol, 5 parts of sulfuric acid with the mass concentration of 10% and 20 parts of deionized water, stirring for 2 hours, removing foam on the surface of slurry, washing the residual liquid for three times by using the deionized water, filtering, drying a filter cake in an oven at the drying temperature of 65 ℃ for 24 hours to obtain refined quartz sand;
(5) and (3) adding a microorganism leaching solution and deionized water into the refined quartz sand obtained in the step (4), wherein the microorganism leaching solution comprises Thiobacillus ferrooxidans and Thiobacillus thiooxidans with the number ratio of 1:1.5, reacting for 4 days, washing for three times by using the deionized water, and drying to obtain the high-purity quartz sand.
Wherein the preparation steps of the microbial leaching solution are as follows: adding Thiobacillus ferrooxidans and Thiobacillus thiooxidans in a biological generator in a ratio of a plurality of times, then adding a certain amount of glucose solution and hydrochloric acid with the mass concentration of 5%, keeping the pH at 2-2.5, introducing compressed air, keeping the temperature at 25 ℃, and reacting for 4 days to obtain the microbial leaching solution.
Example 2
A production process of high-purity quartz sand comprises the following production processes:
(1) adding common quartz sand raw materials into a crusher for crushing, and screening small-particle quartz sand by using a vibrating screen, wherein the particle size of the small-particle quartz sand is 0.03-0.08 mm;
(2) mechanically scrubbing and desliming the small-particle quartz sand obtained in the step (1) in ultrasonic waves, wherein the ultrasonic temperature is 65 ℃, the ultrasonic time is 4.5 hours, cleaning is carried out by deionized water after scrubbing, drying is carried out in an oven after cleaning is carried out for three times, the drying temperature is 75 ℃, and the drying time is 24 hours;
(3) placing the dried quartz sand obtained in the step (2) in a magnetic machine for magnetic separation to remove magnetic substances in the quartz sand;
(4) adding deionized water into the quartz sand obtained in the step (3), uniformly mixing, and adding a flotation agent, wherein the flotation agent comprises the following components in parts by weight: stirring 35 parts of ethyl dithio potassium carbonate, 30 parts of isomeric hexanol, 15 parts of sulfuric acid with the mass concentration of 15% and 50 parts of deionized water for 3.5 hours, removing foam on the surface of slurry, washing the residual liquid for three times by using the deionized water, filtering, drying a filter cake in an oven at the drying temperature of 75 ℃ for 24 hours to obtain refined quartz sand;
(5) and (3) adding a microorganism leaching solution and deionized water into the refined quartz sand obtained in the step (4), wherein the microorganism leaching solution comprises 2:2.5 of thiobacillus ferrooxidans and thiobacillus thiooxidans in number ratio, reacting for 6 days, washing for three times by using the deionized water, and drying to obtain the high-purity quartz sand.
Wherein the preparation steps of the microbial leaching solution are as follows: adding Thiobacillus ferrooxidans and Thiobacillus thiooxidans into a biological generator in a certain ratio, adding a certain amount of glucose solution and hydrochloric acid with the mass concentration of 10%, keeping the pH at 2-2.5, introducing compressed air, keeping the temperature at 30 ℃, and reacting for 6 days to obtain the microbial leaching solution.
Example 3
A production process of high-purity quartz sand comprises the following production processes:
(1) adding common quartz sand raw materials into a crusher for crushing, and screening small-particle quartz sand by using a vibrating screen, wherein the particle size of the small-particle quartz sand is 0.03-0.08 mm;
(2) mechanically scrubbing and desliming the small-particle quartz sand obtained in the step (1) in ultrasonic waves, wherein the ultrasonic temperature is 55 ℃, the ultrasonic time is 3.5 hours, cleaning is carried out by deionized water after scrubbing, drying is carried out in an oven after cleaning is carried out for three times, the drying temperature is 70 ℃, and the drying time is 24 hours;
(3) placing the dried quartz sand obtained in the step (2) in a magnetic machine for magnetic separation to remove magnetic substances in the quartz sand;
(4) adding deionized water into the quartz sand obtained in the step (3), uniformly mixing, and adding a flotation agent, wherein the flotation agent comprises the following components in parts by weight: 30 parts of ethyl dithio potassium carbonate, 25 parts of isomeric hexanol, 7 parts of sulfuric acid with the mass concentration of 12% and 35 parts of deionized water, stirring for 2.8 hours, removing foam on the surface of slurry, washing the residual liquid for three times by using the deionized water, filtering, drying a filter cake in an oven, wherein the drying temperature is 70 ℃, and the drying time is 24 hours, so as to obtain refined quartz sand;
(5) and (3) adding a microorganism leaching solution and deionized water into the refined quartz sand obtained in the step (4), wherein the microorganism leaching solution comprises thiobacillus ferrooxidans and thiobacillus thiooxidans with the number ratio of 1.5:2, reacting for 5 days, washing for three times by using the deionized water, and drying to obtain the high-purity quartz sand.
Wherein the preparation steps of the microbial leaching solution are as follows: adding Thiobacillus ferrooxidans and Thiobacillus thiooxidans into a biological generator in a certain ratio, then adding a certain amount of glucose solution and hydrochloric acid with the mass concentration of 8%, keeping the pH at 2-2.5, introducing compressed air, keeping the temperature at 28 ℃, and reacting for 5 days to obtain the microbial leaching solution.
Purity test
In order to verify the purity of the silica sand according to the present invention, the silica sand prepared in examples 1 to 3 was measured for purity by inductively coupled plasma mass spectrometry, and the measurement results are shown in the following table.
Table 1 purity test results
From the results, the content of silicon dioxide in the quartz sand produced by the process is more than or equal to 99.98 percent, the content of ferric oxide is less than or equal to 0.00098 percent, the obtained high-purity quartz sand has higher purity, and the production process is simple and convenient to operate, does not pollute the environment and is suitable for industrial popularization and application.
The foregoing is directed to embodiments of the present invention and, more particularly, to a method and apparatus for controlling a power converter in a power converter, including a power converter, a power converter.
Claims (9)
1. A high-purity quartz sand is characterized in that: wherein the content of the silicon dioxide is more than or equal to 99.98 percent, and the content of the ferric oxide is less than or equal to 0.00098 percent.
2. A process for producing high purity quartz sand, the high purity quartz sand of claim 1 being prepared by: comprises the following production processes:
(1) adding common quartz sand raw materials into a crusher for crushing, and screening out small-particle quartz sand from the crushed quartz sand by using a vibrating screen;
(2) mechanically scrubbing and desliming the small-particle quartz sand obtained in the step (1) in ultrasonic waves at the ultrasonic temperature of 45-65 ℃ for 2.5-4.5 hours, cleaning the small-particle quartz sand with deionized water after scrubbing, drying the small-particle quartz sand in an oven after cleaning for three times at the drying temperature of 65-75 ℃ for 24 hours;
(3) placing the dried quartz sand obtained in the step (2) in a magnetic machine for magnetic separation to remove magnetic substances in the quartz sand;
(4) adding deionized water into the quartz sand obtained in the step (3), uniformly mixing, adding a flotation agent, stirring for 2-3.5 hours, removing foams on the surface of the slurry, washing the residual liquid for three times by using the deionized water, filtering, and drying the filter cake in an oven at the drying temperature of 65-75 ℃ for 24 hours to obtain refined quartz sand;
(5) and (4) adding the microorganism leaching solution and deionized water into the refined quartz sand obtained in the step (4), reacting for 4-6 days, washing for three times by using the deionized water, and drying to obtain the high-purity quartz sand.
3. The process for producing high purity quartz sand according to claim 2, wherein: the particle size of the small-particle quartz sand in the step (1) is 0.03-0.08 mm.
4. The process for producing high purity quartz sand according to claim 2, wherein: the flotation agent in the step (4) comprises the following components in parts by weight: 25-35 parts of ethyl dithio potassium carbonate, 20-30 parts of isomeric hexanol, 5-15 parts of sulfuric acid and 20-50 parts of deionized water.
5. The process for producing high purity quartz sand according to claim 4, wherein: the mass concentration of the sulfuric acid is 10-15%.
6. The process for producing high purity quartz sand according to claim 2, wherein: the microbial leaching solution in the step (5) comprises thiobacillus ferrooxidans and thiobacillus thiooxidans.
7. The process for producing high purity quartz sand according to claim 6, wherein: the number ratio of the thiobacillus ferrooxidans to the thiobacillus thiooxidans is 1-2: 1.5-2.5.
8. A process for producing high purity silica sand according to claim 6 or 7, wherein: the preparation steps of the microbial leaching solution are as follows: adding Thiobacillus ferrooxidans and Thiobacillus thiooxidans into a biological generator according to the ratio of the number of Thiobacillus ferrooxidans to the number of Thiobacillus thiooxidans to the number of the Thiobacillus thiooxidans, adding a certain amount of glucose solution and hydrochloric acid, keeping the pH at 2-2.5.
9. The process for producing high purity quartz sand according to claim 8, wherein: the mass concentration of the hydrochloric acid is 5-10%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115178372A (en) * | 2021-04-01 | 2022-10-14 | 新沂市中大石英科技有限公司 | High-efficiency magnetic separation method for quartz sand |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115178372A (en) * | 2021-04-01 | 2022-10-14 | 新沂市中大石英科技有限公司 | High-efficiency magnetic separation method for quartz sand |
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